New
#1911
It alters the default DNS server IP addresses, usually your ISP, to use the Google Public DNS Servers (free). Sometimes ISP's like to reroute your request. Google DNS has been around for a long time.
If you want to test your DNS servers against all available, this is a good tool:
GRC's
All explained here:
https://developers.google.com/speed/public-dns/docs/using